proposal announced yesterday, undocumented immigrants must pass a background check, pay fines and back taxes and learn english. ensure the illegal immigrants will not get citizenship before immigrants already working towards a green card. labor unions support this plan. >> we will march, rally, pray and knock on every door in congress to remind lawmakers that our nation deserves an immigration system that sustains our communities, our families, and an economy that values a prosperous nation built by immigrants. >> the president believes that it's very important that we move forward on comprehensive immigration reform. it's the right thing to do for the country, for our economy. it's the right thing to do out of fairness to the middle class to make sure that everyone plays by the same set of rules. >> reporter: however, you can imagine the plan has its critics. 22 g.o.p. senators opposed a similar plan back in 2007. they say this proposal amounts to nothing more than amnesty and the house is also working its own version of immigration reform. and the house has its critics as well. republicans